postgresql-9.1 9.1.4-0ubuntu12.04 source package in Ubuntu

Changelog

postgresql-9.1 (9.1.4-0ubuntu12.04) precise-security; urgency=low
* New upstream bug fix/security release: (LP: #1008317)
- Fix incorrect password transformation in "contrib/pgcrypto"'s DES
crypt() function.
If a password string contained the byte value 0x80, the remainder
of the password was ignored, causing the password to be much weaker
than it appeared. With this fix, the rest of the string is properly
included in the DES hash. Any stored password values that are
affected by this bug will thus no longer match, so the stored
values may need to be updated. (CVE-2012-2143)
- Ignore SECURITY DEFINER and SET attributes for a procedural
language's call handler. Applying such attributes to a call handler
could crash the server. (CVE-2012-2655)
- Make "contrib/citext"'s upgrade script fix collations of citext
arrays and domains over citext.
Release 9.1.2 provided a fix for collations of citext columns and
indexes in databases upgraded or reloaded from pre-9.1
installations, but that fix was incomplete: it neglected to handle
arrays and domains over citext. This release extends the module's
upgrade script to handle these cases. As before, if you have
already run the upgrade script, you'll need to run the collation
update commands by hand instead. See the 9.1.2 release notes for
more information about doing this.
- Allow numeric timezone offsets in timestamp input to be up to 16
hours away from UTC. Some historical time zones have offsets larger than
15 hours, the previous limit. This could result in dumped data values
being rejected during reload.
- Fix timestamp conversion to cope when the given time is exactly the
last DST transition time for the current timezone.
This oversight has been there a long time, but was not noticed
previously because most DST-using zones are presumed to have an
indefinite sequence of future DST transitions.
- Fix text to name and char to name casts to perform string
truncation correctly in multibyte encodings.
- Fix memory copying bug in to_tsquery().
- Ensure txid_current() reports the correct epoch when executed in
hot standby.
- Fix planner's handling of outer PlaceHolderVars within subqueries.
This bug concerns sub-SELECTs that reference variables coming from
the nullable side of an outer join of the surrounding query. In
9.1, queries affected by this bug would fail with "ERROR:
Upper-level PlaceHolderVar found where not expected". But in 9.0
and 8.4, you'd silently get possibly-wrong answers, since the value
transmitted into the subquery wouldn't go to null when it should.
- Fix planning of UNION ALL subqueries with output columns that are
not simple variables.
Planning of such cases got noticeably worse in 9.1 as a result of a
misguided fix for "MergeAppend child's targetlist doesn't match
MergeAppend" errors. Revert that fix and do it another way.
- Fix slow session startup when pg_attribute is very large.
If pg_attribute exceeds one-fourth of shared_buffers, cache
rebuilding code that is sometimes needed during session start would
trigger the synchronized-scan logic, causing it to take many times
longer than normal. The problem was particularly acute if many new
sessions were starting at once.
- Ensure sequential scans check for query cancel reasonably often.
A scan encountering many consecutive pages that contain no live
tuples would not respond to interrupts meanwhile.
- Ensure the Windows implementation of PGSemaphoreLock() clears
ImmediateInterruptOK before returning.
This oversight meant that a query-cancel interrupt received later
in the same query could be accepted at an unsafe time, with
unpredictable but not good consequences.
- Show whole-row variables safely when printing views or rules.
Corner cases involving ambiguous names (that is, the name could be
either a table or column name of the query) were printed in an
ambiguous way, risking that the view or rule would be interpreted
differently after dump and reload. Avoid the ambiguous case by
attaching a no-op cast.
- Fix "COPY FROM" to properly handle null marker strings that
correspond to invalid encoding.
A null marker string such as E'\\0' should work, and did work in
the past, but the case got broken in 8.4.
- Fix "EXPLAIN VERBOSE" for writable CTEs containing RETURNING
clauses.
- Fix "PREPARE TRANSACTION" to work correctly in the presence of
advisory locks.
Historically, "PREPARE TRANSACTION" has simply ignored any
session-level advisory locks the session holds, but this case was
accidentally broken in 9.1.
- Fix truncation of unlogged tables.
- Ignore missing schemas during non-interactive assignments of
search_path.
This re-aligns 9.1's behavior with that of older branches.
Previously 9.1 would throw an error for nonexistent schemas
mentioned in search_path settings obtained from places such as
"ALTER DATABASE SET".
- Fix bugs with temporary or transient tables used in extension
scripts.
This includes cases such as a rewriting "ALTER TABLE" within an
extension update script, since that uses a transient table behind
the scenes.
- Ensure autovacuum worker processes perform stack depth checking
properly.
Previously, infinite recursion in a function invoked by
auto-"ANALYZE" could crash worker processes.
- Fix logging collector to not lose log coherency under high load.
The collector previously could fail to reassemble large messages if
it got too busy.
- Fix logging collector to ensure it will restart file rotation after
receiving SIGHUP.
- Fix "too many LWLocks taken" failure in GiST indexes.
- Fix WAL replay logic for GIN indexes to not fail if the index was
subsequently dropped.
- Correctly detect SSI conflicts of prepared transactions after a
crash.
- Avoid synchronous replication delay when committing a transaction
that only modified temporary tables.
In such a case the transaction's commit record need not be flushed
to standby servers, but some of the code didn't know that and
waited for it to happen anyway.
- Fix error handling in pg_basebackup.
- Fix walsender to not go into a busy loop if connection is
terminated.
- Fix memory leak in PL/pgSQL's "RETURN NEXT" command.
- Fix PL/pgSQL's "GET DIAGNOSTICS" command when the target is the
function's first variable.
- Ensure that PL/Perl package-qualifies the _TD variable.
This bug caused trigger invocations to fail when they are nested
within a function invocation that changes the current package.
- Fix PL/Python functions returning composite types to accept a
string for their result value.
This case was accidentally broken by the 9.1 additions to allow a
composite result value to be supplied in other formats, such as
dictionaries.
- Fix potential access off the end of memory in psql's expanded
display ("\x") mode.
- Fix several performance problems in pg_dump when the database
contains many objects.
pg_dump could get very slow if the database contained many schemas,
or if many objects are in dependency loops, or if there are many
owned sequences.
- Fix memory and file descriptor leaks in pg_restore when reading a
directory-format archive.
- Fix pg_upgrade for the case that a database stored in a non-default
tablespace contains a table in the cluster's default tablespace.
- In ecpg, fix rare memory leaks and possible overwrite of one byte
after the sqlca_t structure.
- Fix "contrib/dblink"'s dblink_exec() to not leak temporary database
connections upon error.
- Fix "contrib/dblink" to report the correct connection name in error
messages.
- Fix "contrib/vacuumlo" to use multiple transactions when dropping
many large objects.
This change avoids exceeding max_locks_per_transaction when many
objects need to be dropped. The behavior can be adjusted with the
new -l (limit) option.
-- Martin Pitt <email address hidden> Mon, 04 Jun 2012 06:31:48 +0200

This package contains the necessary files to build ECPG (Embedded
PostgreSQL for C) programs. It includes the development libraries
and the preprocessor program ecpg.
.
PostgreSQL is an object-relational SQL database management system.
.
Install this package if you want to write C programs with SQL statements
embedded in them (rather than run by an external process).

Header files and static library for compiling C programs to link
with the libpq library in order to communicate with a PostgreSQL
database backend.
.
PostgreSQL is an object-relational SQL database management system.

libpq is a C library that enables user programs to communicate with
the PostgreSQL database server. The server can be on another machine
and accessed through TCP/IP. This version of libpq is compatible
with servers from PostgreSQL 8.2 or later.
.
This package contains the run-time library, needed by packages using
libpq.
.
PostgreSQL is an object-relational SQL database management system.

PostgreSQL is a fully featured object-relational database management
system. It supports a large part of the SQL standard and is designed
to be extensible by users in many aspects. Some of the features are:
ACID transactions, foreign keys, views, sequences, subqueries,
triggers, user-defined types and functions, outer joins, multiversion
concurrency control. Graphical user interfaces and bindings for many
programming languages are available as well.
.
This package provides the database server for PostgreSQL 9.1. Servers
for other major release versions can be installed simultaneously and
are coordinated by the postgresql-common package. A package providing
ident-server is needed if you want to authenticate remote connections
with identd.

PostgreSQL is a fully featured object-relational database management
system. It supports a large part of the SQL standard and is designed
to be extensible by users in many aspects. Some of the features are:
ACID transactions, foreign keys, views, sequences, subqueries,
triggers, user-defined types and functions, outer joins, multiversion
concurrency control. Graphical user interfaces and bindings for many
programming languages are available as well.
.
This package provides detached debugging symbols for PostgreSQL 9.1.

This package contains client and administrative programs for
PostgreSQL: these are the interactive terminal client psql and
programs for creating and removing users and databases.
.
This is the client package for PostgreSQL 9.1. If you install
PostgreSQL 9.1 on a standalone machine, you need the server package
postgresql-9.1, too. On a network, you can install this package on
many client machines, while the server package may be installed on
only one machine.
.
PostgreSQL is an object-relational SQL database management system.

PL/Perl enables an SQL developer to write procedural language functions
for PostgreSQL 9.1 in Perl. You need this package if you have any
PostgreSQL 9.1 functions that use the languages plperl or plperlu.
.
PostgreSQL is an object-relational SQL database management system.

PL/Python enables an SQL developer to write procedural language functions
for PostgreSQL 9.1 in Python. You need this package if you have any
PostgreSQL 9.1 functions that use the languages plpython or plpythonu.
.
PostgreSQL is an object-relational SQL database management system.

PL/Python 3 enables an SQL developer to write procedural language functions
for PostgreSQL 9.1 in Python 3. You need this package if you have any
PostgreSQL 9.1 functions that use the languages plpython3 or plpython3u.
.
PostgreSQL is an object-relational SQL database management system.

PL/Tcl enables an SQL developer to write procedural language functions
for PostgreSQL 9.1 in Tcl. You need this package if you have any
PostgreSQL 9.1 functions that use the languages pltcl or pltclu.
.
PostgreSQL is an object-relational SQL database management system.

Header files for compiling SSI code to link into PostgreSQL's backend; for
example, for C functions to be called from SQL.
.
This package also contains the Makefiles necessary for building add-on
modules of PostgreSQL, which would otherwise have to be built in the
PostgreSQL source-code tree.
.
PostgreSQL is an object-relational SQL database management system.